Spring Boot 菜鸟笔记（三） 使用AOP处理请求

1、添加依赖

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-aop</artifactId>
        </dependency>

2、建立aspect包，在其下建立HttpAspect类

@Aspect
@Component
public class HttpAspect {
    @Before("execution(public * com.egghu.girl.controller.GirlController.*(..))")
    public void log(){
        System.out.println(11111);
    }
    @After("execution(public * com.egghu.girl.controller.GirlController.*(..))")
    public void doAfter(){
        System.out.println(22222);
    }
}

或是

@Aspect
@Component
public class HttpAspect {


    @Pointcut("execution(public * com.egghu.girl.controller.GirlController.*(..))")
    public void log(){
    }
    @Before("log()")
    public void doBefore(){
        System.out.println(11111);
    }
    @After("log()")
    public void doAfter(){
        System.out.println(22222);
    }
}

或是

@Aspect
@Component
public class HttpAspect {
    private final static org.slf4j.Logger logger=LoggerFactory.getLogger(HttpAspect.class);


    @Pointcut("execution(public * com.egghu.girl.controller.GirlController.*(..))")
    public void log(){
    }
    @Before("log()")
    public void doBefore(){
        logger.info("11111");
    }
    @After("log()")
    public void doAfter(){
        logger.info("22222");
    }
}

最终形式（HttpAspect）：

@Aspect
@Component
public class HttpAspect {
    private final static org.slf4j.Logger logger=LoggerFactory.getLogger(HttpAspect.class);


    @Pointcut("execution(public * com.egghu.girl.controller.GirlController.*(..))")
    public void log(){
    }
    @Before("log()")
    public void doBefore(JoinPoint joinPoint){
        ServletRequestAttributes attributes=(ServletRequestAttributes)RequestContextHolder.getRequestAttributes();
        HttpServletRequest request= attributes.getRequest();
        //url
        logger.info("url={}",request.getRequestURI());
        //method
        logger.info("method={}",request.getMethod());
        //ip
        logger.info("ip={}",request.getRemoteAddr());
        //类方法
        logger.info("class_method={}",joinPoint.getSignature().getDeclaringTypeName() + "."+ joinPoint.getSignature().getName());

        //参数
        logger.info("args={}",joinPoint.getArgs());
    }
    @After("log()")
    public void doAfter(){
        logger.info("22222");
    }
    //获取输出的内容
    @AfterReturning(returning = "object",pointcut = "log()")
    public void doAfterReturning(Object object){
        logger.info("response={}",object);
    }
}

为了获取输出的内容，在Girl中要添加toString方法

@Override
    public String toString() {
        return "Girl{" +
                "id=" + id +
                ", cupSize='" + cupSize + '\'' +
                ", age=" + age +
                '}';
    }